I have been searching for compatability issues for a laptop running 64 bit Vixta. The lady who bought it doesn't even understand the difference between 32 and 64 bit. I've read where people had no problems to articles where they had all kinds of problems. Supposedly Vista 64 bit has something built into it that somehow lets 32 bit software run on a Vista 64 bit machine, but I had never heard of it. I'm sure you have knowledge about this issue. I have many customers and I have kept them running XP 32 bit because that is all they need and it is supported, at least SP3, until 2014. I do not plan on running anything 64 bit myself until Windows 7 64 bit comes out and there is enough software to warrant the change. Please let me know what you have experienced and or heard about what we are getting into. I am not in a position of running any other operating system than those from Microsoft because my customers are set in their ways and I have all of their systems working so well that I don't hear from most except maybe every other year. Just this one woman who likes to make decisions based on something, maybe her astrology program that she was afraid would not run.